Претрага

Упит dcterms_subject_txt:MIS 5 to MIS 3

1736 items

  • Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes

    Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović (2016)
    menadžment, rudrastvo i energetski kompleksi, okruženje, održivi razvoj, mrežno planiranje
    ... management. No. Mark Time Event Duration i Event Duration j Time Reserves Total Free Independent n (i–j) (tij) (TE)i (TL)i (TE)j (TL)j Pij Sij Nij 1 * 1–2 2 0 0 2 2 0 0 0 2 * 2–3 1 2 2 3 3 0 0 0 3 * 3–4 1 3 3 4 4 0 0 0 4 * 2–5 1 4 4 5 5 0 0 0 5 4–5 2 2 2 5 5 1 1 1 6 * 5–6 1 5 5 6 6 0 0 0 7 6–7 2 6 ...
    ... operational activities. It is graded from 1 to 5 as follows: at least daily (5); at least weekly (4); at least monthly (3); at least annually (2); and less than annually (1). The quantity is graded 0 to 3, with the following categories: aspect of national importance (3); aspect of organizational importance ...
    ... operational activities. It is graded from 1 to 5 as follows: at least daily (5); at least weekly (4); at least monthly (3); at least annually (2); and less than annually (1). The quantity is graded 0 to 3, with the following categories: aspect of national importance (3); aspect of organizational importance ...

  • Named Entity Recognition for Distant Reading in ELTeC

    Francesca Frontini, Carmen Brando, Joanna Byszuk, Ioana Galleron, Diana Santos, Ranka Stanković (2020)
    Akcija COST „Udaljeno čitanje za evropsku književnu istoriju“, koja je počela 2017. godine, ima među svojim glavnim ciljevima stvaranje višejezične zbirke evropskih književnih tekstova (ELTeC) otvorenog koda. U ovom radu predstavljamo rad koji je obavljen na ručnom označavanju selekcije ELTeC kolekcije za imenovane entitete, kao i na proceni postojećih alata za prepoznavanje imenovanih entiteta u pogledu njihove sposobnosti da automatski urade takve anotacije. U poslednjem paragrafu se razmatraju zajedničke tačke između ove inicijative i CLARIN-a.
    ... L O C 1 5 7 5 7 3 9 6 0 .2 8 4 0 .7 3 4 0 .7 1 6 P E R S 5 6 9 2 3 6 3 9 3 0 .5 9 1 0 .7 0 7 0 .4 0 9 S ta n f o r d - e n g L O C 9 8 1 0 0 1 2 6 0 .4 3 8 0 .4 9 5 0 .5 6 3 P E R S 6 4 9 5 3 5 3 9 9 0 .6 1 9 0 .5 4 8 0 .3 8 1 S P A C Y -e n g L O C 9 8 1 0 0 1 7 0 0 .3 6 6 0 .4 9 5 0 .6 3 4 P E ...
    ... 9 7 152 2 0 0 1091 3 6 7 7 n o r 4 8 83 25 3 9 9 0 2 01 10 p o r1 17 9 351 19 0 9 4 0 4 9 0 5 4 p o r2 3 4 1 2 5 6 3 0 7 1 05 9 3 4 7 7 slv 133 5 4 3 3 6 37 0 12 3 0 6 2 0 2 srp 121 18 185 11 0 9 85 3 01 4 7 0 0 114 2 4 2 5 2 1 3 138 1 0 5 1 4 3 6 8 5 131 T a b le 1: D a ta o n th e m a n u ...
    ... s im p lif ie d to a v o id n e s te d a n n o ta tio n s a n d o v e r la p . D E M O E V E N T L O C O R G O T H E R P E R S R O L E W O R K c z e 163 5 2 7 5 0 0 11 50 4 5 4 0 d e u 6 6 2 3 2 3 12 0 9 7 3 4 5 8 4 e n g 5 6 7 198 37 0 11 8 4 2 0 3 25 f ra 7 7 3 2 6 2 2 2 128 9 0 0 2 4 4 ...

  • Stratigraphy and microfossils (radiolarians and planktonic foraminifers) of the Upper Cretaceous (upper Santonian–lower Campanian) Struganik limestone (Western Serbia)

    Liubov G. Bragina, Nikita Yu. Bragin, Ludmila F. Kopayevich, Nevenka Đerić, Nataša Gerzina Spajić (2019)
    Paleontology, Stratigraphy, Ecology, Evolution, Behavior and Systematics

  • Underground loading-haulage equipment selection with application of topsis method with different weighting methods of criteria

    Vladimir Krivošić, Luka Crnogorac, Rade Tokalić (2024)
    The choice of adequate mining machines is one of the most complex problems in the underground exploitation of mineral raw materials. The weight of such a decision is reflected in the high prices of these machines and the occurrence of even greater costs during their use if their choice was wrongly conceived. There are numerous examples from practice in which such decisions were made solely on the basis of comparing the prices of machines, without considering any of the ...
    utovarno-transportna mehanizacija, izbor, TOPSIS, entropija, standardna devijacija, težina kriterijuma

  • Evaluation And Perspectives Of Underground Coal Mines In Serbia

    Vladimir Milisavljević, Milena Lekić, Ivica Ristović, Vojin Čokorilo, Aleksandar Cvjetić (2017)
    ... REMBAS - Strmosten 3 3 2 3 3 4 4 - Block IV 2 2 2 3 4 4 2 - Senjski rudnik 1 2 2 2 3 4 1 Soko 5 2 1 3 3 4 4 Bogovina 2 3 4 1 2 2 1 Jasenovac 2 2 3 2 3 2 2 Lubnica 4 4 2 3 2 2 2 Štavalj 5 3 3 3 3 1 1 Table 3. Production from PCUCE mines, in period 2010-2015 Year ...
    ... 059232; RI = 1.32; CR = 0.044873; Table 6. Random index n 3 4 5 6 7 8 9 10 RI 0.58 0.9 1.12 1.24 1.32 1.41 1.49 1.51 Rank of the underground coal mines operated by PCUCE obtained after completion of the calculation according to the AHP method is given in the Table 7. It can be seen that Soko ...
    ... operation until depletion of reserves or in relation to other non-technical criteria (such as social importance). Table 7. Rank of the PCUCE mines Rank Mine Value 1 Soko 0.1296 2 Strmosten 0.1203 3 Lubnica 0.1191 4 Štavalj 0.1179 5 Block IV 0.0987 6 Jasenovac 0.0738 7 Tadenje 0.0715 ...

  • Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)
    analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem
    ... southern prolongation of 4 and 5 in M5, 5 in M7, 6 in M8, 6 and 7 in M9, 3 in M10, southern prolongation of 4 in M11 and M12, Fig. 5). The decrease in offset in models explains well the observed significant decrease in Timok fault dextral offset from 65 km in the north to around 5–10 km south of Pirot basin ...
    ... (Figs. 3–5) and amount of rotation for set- ups where the crust consists of brittle material only (Fig. 5). Thereafter, we describe the results for models with brittle-ductile rheological stratification, for which we similarly vary the indenter shape and amount of rotation (Fig. 5). Next to displaying ...
    ... regimes in map-view (Figs. 3–5 and 8). Furthermore, we use time-lapse top-view videos of incremental strain components and cumulative strain type, available in the Supplementary Appendix A, B, D, E and temporal evo- lution of selected grid cells (Supplementary Appendix C and F) to derive and explain detailed ...

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... a n to n ia n -C a m p a n ia n 6 B o g d an o v ić q u ar ry 3 9 5 5 – 9 7 7 , 4 0 4 5 – 0 5 7 4 1 1 4 – 1 3 7 4 4 � 1 3 0 1 5 00 2 0 � 2 8 0 4 1 00 W h it e li m es to n e re d li m es to n e 1 8 /6 1 3 0 /6 1 2 6 0 .8 2 .6 * 2 5 2 .7 5 8 .9 * 5 9 4 1 4 .5 4 .2 2 5 1 .7 3 5 9 .3 ...
    ... je 4 2 9 9 – 3 1 3 4 4 � 1 0 0 5 7 00 2 0 � 0 4 0 1 4 00 M ar ly li m es to n es g re y is h -w h it e 1 4 /1 5 2 3 0 .3 2 3 9 .4 7 8 4 .5 2 1 9 .7 2 3 2 .6 7 8 4 .5 3 4 0 /1 6 S a n to n ia n 4 V ra će v šn ic a 4 3 1 4 – 3 2 5 4 4 � 0 4 0 2 2 00 2 0 � 3 4 0 5 0 00 F ly sc h ...
    ... 1 8 .9 2 4 0 .3 3 2 8 3 .7 2 3 7 .7 2 1 5 .5 3 2 8 3 .7 9 4 /5 0 9 9 /4 1 U p p e r C e n o m a n ia n -T u ro n ia n 5 G aj ić q u ar ry 4 2 8 3 – 2 9 8 4 4 � 0 6 0 2 6 00 2 0 � 0 9 0 5 9 00 L im es to n e p in k is h g re y 1 5 /1 6 3 8 .8 4 7 .4 2 1 1 2 .6 3 6 .2 2 6 .7 2 ...

  • A Fuzzy Expert Model for Availability Evaluation

    Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić (2019)
    Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...
    raspoloživost, ekspertski sistem, fazi teorija, buldozeri
    ... indicators (j = 1 … 5). Defined A fuzzy set can be written as: - poor = (1/j=1, 0.25/j=2, 0/j=3, 0/j=4, 0/j=5); - adequate = (0.25/j=1, 1/j=2, 0.25/j=3, 0/j=4, 0/j=5); - average = (0/j=1, 0.25/j=2, 1/j=3, 0.25/j=4, 0/j=5); (7) - good = (0/j=1, 0/j=2, 0.25/j=3, 1/j=4, 0.25/j=5); - excellent ...
    ... 2/(0×0.06), 3/(0×0.06), 4/(0.25×0.06), 5/(1×0.06)}. The remaining four linguistic variables are treated in the same way. Rexc.0.06 = (1/0, 2/0, 3/0, 4/0.015, 5/0.06) Rgood.0.62 = (1/0, 2/0, 3/0.155, 4/0.62, 5/0.155) Ravr.0.32 = (1/0, 2/0.08, 3/0.32, 4/0.08, 5/0) Radq.0 = (1/0, 2/0, 3/0, 4/0, ...
    ... j]c / 3 (3) All of these outcomes are treated with the max-min composition, as follows: - For each outcome search for the MINimum value of μR,M,S in vector Ac (2). The minimum that corresponds to the o-th combination is calculated following the equations: MINo = min{μR j = 1, …, 5, μM ...

  • The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector

    Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković (2020)
    Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...
    energetska bezbednost, prirodni gas, fazi AHP, AHP višekriterijumska analiza, fazi teorija
    ... affordability (A3), which is very well rated. This scenario tends to underperform pollutant emissions compared to combined scenario 3, due to intensified industrial development and increased natural gas consumption. • Combined scenario 5 (SC5) The results of the analysis in the first synthesis level ...
    ... producing electricity from intermittent renewable energy sources (wind and solar) [68]. According to [2,74], planned capacities of these plants are from 3 MWe to 140 MWe, with thermal load between 40 and 200 MW. Table 5. Natural gas consumption demand projection until 2030 [73]. Scenario HIST Scenario HIGH ...
    ... that the linguistic variable E (“very low”) is assigned a value of 0.08. At the same time, the linguistic variable E is defined as E = (1/1; 2/1; 3/0; 4/0; 5/0; 6/0; 7/0; 8/0; 9/0; 10/0) which is shown in both Figure 3 and expression 2. In this particular case, a specific value of linguistic variable E ...

  • Modeliranje tehnoloških procesa u rudarstvu u uslovima nedovoljnosti podataka primenom teorije grubih skupova

    Zoran M. Štirbanović (2015-07-01)
    Rudarstvo, a u okviru njega i priprema mineralnih sirovina, se odlikuje složenošću tehnoloških procesa što je posledica velikog broja uticajnih parametara. Samim tim je potrebno biti veoma obazriv prilikom donošenja odluka u oblasti rudarstva. U cilju što efikasnijeg funkcionisanja procesa, moguće je primeniti različite metode koje služe za pojednostavljenje procesa odlučivanja. Jedna od takvih metoda jeste i teorija grubih skupova. Ona predstavlja relativno novu matematičku teoriju koja je pogodna za razumevanje nepreciznih i nepotpunih podataka kao i za otkrivanje ...
    rudarstvo, priprema mineralnih sirovina, teorija grubih skupova, višekriterijumsko odlučivanje, flotacijsko jalovište, flotacijski kolektor, flotaciona mašina
    ... kolektora. Kolektor Atribut uslova Atribut odluke 1 2 3 4 5 6 7 KEX1 2 2 3 3 2 2 2 4 KEX2 3 2 3 3 2 2 3 1 KEX3 2 2 3 3 2 3 3 3 KAX1 3 2 2 3 2 3 3 2 KAX2 1 2 2 2 2 3 3 8 KAX3 2 2 3 3 2 1 3 6 NaIPX1 2 2 3 3 2 3 3 4 NaIPX2 2 2 2 2 1 2 3 6 Rezultati analize i ocene flotacijskih kolektora ...
    ... 𝑊𝑖 S12 2 3 4 5 6 1 7 0,0641 0,7845 S13 1 2 3 4 5 6 7 0,0167 0,2041 S14 2 3 4 5 1 6 7 0,0641 0,7845 S15 1 2 3 4 5 6 7 0,0167 0,2041 S16 1 2 3 4 5 6 7 0,0143 0,1750 S17 1 2 3 4 5 6 7 0,0167 0,2041 S18 1 2 3 4 5 6 7 0,0143 0,1750 S21 1 7 2 3 4 5 6 0,0816 0,8498 S23 1 2 3 4 5 7 6 0,0167 ...
    ... S31 6 7 1 2 3 4 5 0,0816 1,0000 S32 6 1 2 3 4 5 7 0,0816 1,0000 S34 2 3 4 5 6 7 1 0,0641 0,7845 S35 1 2 3 4 5 6 7 0,0000 0,0000 S36 1 2 3 4 5 6 7 0,0000 0,0000 S37 1 2 3 4 5 6 7 0,0000 0,0000 S38 1 2 3 4 5 6 7 0,0000 0,0000 S41 1 6 7 2 3 4 5 0,0816 0,8498 S42 6 1 2 3 4 5 7 0,0961 1,0000 ...

  • Синтеза, структурне и магнетне особине Ca1-xGdxMnO3 нанопрахова

    Milena Rosić (2014-12-05)
    У оквиру ове докторске тезе, испитиване су оптималне методе за добијањенанопраха – калцијум манганског оксида допираног јонима гадолинијума. Циљистраживања је испитивање одговарајућих прекурсора који су подесни да седобију чисти нано прахови манганита са перовскитском структуром, као имонофазни чврсти раствори са перовскитском структуром. Као подесан методкоришћена је модификована глицин нитратна метода, а од прекурсора нитрати иацетати одговарајућих метала. Модификација глицин нитратне методе се односина делимичну замену нитрата ацетатима, чиме је ублажена бурност реакције.Испитан је различити однос прекурсора, који дају наночестичне ...
    Наноструктурни материјали, Оксиди, Термална анализа,Рендгенструктурна анализа, Магнетна мерења.
    ... 2.6 -0.3 1 5 3 3 8 0.855887 128.311 1.550976 53.9 59.8 -5.9 1 5 5 1 8 0.855429 128.437 1.555322 57.1 63.3 -6.3 1 3 3 5 8 0.854779 128.618 1.561545 20.6 22.8 -2.3 2 5 3 3 8 0.855887 128.893 ...
    ... 9335(9) 1,8994(7) 1,8994(7) 1,84859(5) 1,97726(6) 1,84859(5) 1,97726(6) 1,91378(5) 1,91378(5) 1,90684(3) 1,91820(3) 1,90684(3) 1,91820(3) 1,90151(2) 1,90151(2) 1,88364(4) 1,96677(4) 1,88364(4) 1,96677(4) 1,91264(3) 1,91264(3) RB 3,23 2,78 2,47 1,98 RF 4,37 3,98 ...
    ... ширини [%] 21 ,7 9 23 ,0 8 20 ,5 1 20 ,0 0 21 ,2 5 14 ,1 0 20 ,0 0 18 ,7 5 16 ,2 5 17 ,5 0 17 ,5 0 16 ,2 5 Скупљањепо висини [%] 23 ,2 1 18 ,6 4 18 ,9 1 18 ,7 5 22 ,2 2 3, 23 18 ,1 8 14 ,2 9 12 ,5 0 18 ,1 8 30 ,7 7 25 ,0 0 Запреминско ...

  • Development of integrated fuzzy model for mine management optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    fuzzy logika, višekriterijumsko odlučivanje, ocenjivanje eksperata
    ... 2023 1417 Table 2 Analysis of alternatives relative to criteria Crite- Al A? A3 A4 Weight rion coefficients KI Al 1 1 1 |0.25| 0.3 | 0.5} 1 2 3 |0.086|0.176 | 0.372 A2 1 2 1 1 2 3 1 2 3 |0.134|0.324 | 0.677 A3 2 3 1 1 1 3 4 5 |0.212)0.394|0.744 A4 |0.33|0.5 1 0.2 | 0.95/0.3| 1 1 1 ...
    ... 098|0.210 A2 1 2)|3 1 1 1 2 3 |0.2,0.25,0.33 | 0.102 | 0.225 | 0.440 A5 2 3 | 4 |0.33| 0.5 1 1 1 |0.2|0.25|0.33|0.113 | 0.203 | 0.381 A4 1 2)|3 3 4 5 3 4 5 1 1 1 |0.256,0.472 | 0.841 Ka Al 1 1 1 1 2 3 |0.25| 0.3 |0.5| 1 2 3 |0.114,0.267|0.581 A2 |0.33|05)/ 1 1 1 1 1 2 3 1 2 3 |0.116,0.277 0.620 ...
    ... 1 |0.062 0.104 | 0.225 Al 1 1 1 |0.33, 0.5 1 |0.25| 0.3 | 0.5} 1 2 3 |0.085|0.165 | 0.332 A2 1 1 1 1 a 4 5 |2 3 4 |0.231,0.435|0.786 A3 2 3 | 4 | 0.2 |0.25|0.33| 1 1 1 2 3 4 |0.171,0.315 | 0.564 A4 |0.25|0.3,0.5|0.25| 0.3 | 0.5 | 0.25| 0.3 |0.5, 1 1 1 |0.057,0.082|0.151 Ai | ı | ı| |0.33|0.5 ...

  • Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija

    Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)
    flotacijska jalovišta, životna sredina, višekriterijumska analiza, ekologija, Trepča
    ... C8 C9 C10 C1 1 1 2 2 5 4 7 5 6 8 C2 1 1 2 2 4 4 5 6 7 8 C3 1/2 1/2 1 2 5 5 5 6 7 8 C4 1/2 1/2 1/2 1 2 2 5 4 6 7 C5 1/5 1/4 1/5 1/2 1 1 5 4 7 6 C6 1/4 1/4 1/5 1/2 1 1 5 4 5 6 C7 1/7 1/5 1/5 1/5 1/5 1/5 1 3 3 4 C8 1/5 1/6 1/6 1/4 1/4 1/4 1/3 1 3 5 C9 1/6 1/7 1/7 1/6 1/7 1/5 1/3 1/3 1 2 C10 1/8 1/8 1/8 ...
    ... C8 C9 C10 Cl 1 1 2 2 5 4 7 5 6 8 C2 1 1 2 2 4 4 5 6 7 8 C3 1/2 1/2 1 2 5 5 5 6 7 8 C4 1/2 1/2 1/2 1 2 2 5 4 6 7 C5 1/5 1/4 1/5 1/2 1 1 5 4 7 6 C6 1/4 1/4 1/5 1/2 1 1 5 4 5 6 C7 1/7 1/5 1/5 1/5 1/5 1/5 1 3 3 4 C8 1/5 1/6 1/6 1/4 1/4 1/4 1/3 1 3 5 C9 1/6 1/7 1/7 1/6 1/7 1/5 1/3 1/3 1 2 C10 1/8 1/8 1/8 1/7 ...
    ... random index (RI), according to Equation (5): CR = CI RI (5) Random index (RI) depends on the matrix row, and is taken from Table 6, in which the first row is compared to the matrix row, and the second row is composed of RI. Table 6. Random Index (RI) [23]. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 ...

  • Using English Baits to Catch Serbian Multi-Word Terminology

    Cvetana Krstev, Branislava Šandrih, Ranka Stanković (2018)
    In this paper we present the first results in bilingual terminology extraction. The hypothesis of our approach is that if for a source language domain terminology exists as well as a domain aligned corpus for a source and a target language, then it is possible to extract the terminology for a target language. Our approach relies on several resources and tools: aligned domain texts, domain terminology for a source language, a terminology extractor for a target language, and a ...
    aligned texts, word alignment, terminology extraction, electronic dictionaries, morphological inflection
    ... io te ka rs ki dr uš tv o bi bl io te ka r li br ar ia n 1, 3, 5 bi bl io te čk o in fo rm ac io no g si te m a bi bl io te čk ii nf or m ac io ni si te m a na bi bl io te čk ii nf or m ac io ni si st em bi bl io te čk i in fo rm a- ci on is is te m li ...
    ... bl io te ka a gr ad̄ a iz dr ug ib ib li ot ek a bi bl io te čk ig ra d̄a li br ar y m at er ia l 1 bi bl io te čk e st an da rd e bi bl io te čk is ta nd ar d bi bl io te čk is ta nd ar d bi bl io te čk ig ra d̄a li br ar y m at er ia l 1, 3, 5, 6 no ...
    ... ic ti on ar y R es ul t se ts M W T bi bl io te čk ih ud ru že nj a sa bi bl io te čk iu dr už en je bi bl io te čk iu dr už en je bi bl io te ka dr uš tv o as so ci at io n li br ar y 1, 3, 5, 6 ye s bi bl io te ka rs ki m dr uš tv im a bi bl io te ka ...

  • Analysis of the exhaust emissions inventory from auxiliary mining machines

    Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović (2023)
    Open-pit coal mines are equipped with a large number of mining machines and vehicles with diesel engines. Due to common daily operation of these machines and vehicles large amounts of exhaust gases which contain numerous pollutants are emitted into the atmosphere. The demand to reduce air pollution induced the activities in developed countries to map and calculate all gases emitted by industries to formulate and select adequate preventive activities. In collaboration with machine manufacturers, emission standards for off-road machines ...
    emissions, mining, auxiliary machines

  • Effectiveness Analysis of Different Bucket-wheel Excavators

    Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić (2021)
    Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...
    bucket-wheel excavator, open-pit coal mine, mining, multi-criteria decision methods

  • Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike

    Milanka N. Negovanović (2015-06-30)
    Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...
    model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina
    ... 200 250 300 350 400 450 1 .0 0 1 .2 3 1 .4 5 1 .6 8 1 .9 2 .1 3 2 .3 5 2 .5 8 2 .8 3 .0 3 3 .2 5 3 .4 8 3 .7 3 .9 3 4 .1 5 4 .3 8 4 .6 4 .8 3 5 .0 5 5 .2 8 5 .5 Maksimalna brzina oscilovanja Vmax (mm/s) U če s ta lo s t 0% 10% 20% 30% 40% 50% 60% ...
    ... Kumulativna učestalost % Slika 5-21. Učestalost pojavljivanja i kumulativna učestalost maksimalne brzine oscilovanja Vmax (mm/s) 0 1 2 3 4 5 6 7 8 5 8 1 1 1 4 1 7 2 0 2 3 2 6 2 9 3 2 3 5 3 8 4 1 4 4 4 7 5 0 5 3 5 6 Frekvencija f (Hz) U če s ta lo s t 0% 10% 20% 30% ...
    ... Kumulativna učestalost % Slika 5-16. Učestalost pojavljivanja i kumulativna učestalost dužine bušotine l (m) 0 5 10 15 20 25 0 .5 1 .1 1 .7 2 .3 2 .9 3 .5 4 .1 4 .7 5 .3 5 .9 6 .5 7 .1 7 .7 8 .3 8 .9 Dužina minskog punjenja lp (m) U če s ta lo s t 0% 10% 20% 30% 40% ...

  • Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike

    Milanka N. Negovanović (2015-06-30)
    Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...
    model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina
    ... 200 250 300 350 400 450 1 .0 0 1 .2 3 1 .4 5 1 .6 8 1 .9 2 .1 3 2 .3 5 2 .5 8 2 .8 3 .0 3 3 .2 5 3 .4 8 3 .7 3 .9 3 4 .1 5 4 .3 8 4 .6 4 .8 3 5 .0 5 5 .2 8 5 .5 Maksimalna brzina oscilovanja Vmax (mm/s) U če s ta lo s t 0% 10% 20% 30% 40% 50% 60% ...
    ... Kumulativna učestalost % Slika 5-21. Učestalost pojavljivanja i kumulativna učestalost maksimalne brzine oscilovanja Vmax (mm/s) 0 1 2 3 4 5 6 7 8 5 8 1 1 1 4 1 7 2 0 2 3 2 6 2 9 3 2 3 5 3 8 4 1 4 4 4 7 5 0 5 3 5 6 Frekvencija f (Hz) U če s ta lo s t 0% 10% 20% 30% ...
    ... Kumulativna učestalost % Slika 5-16. Učestalost pojavljivanja i kumulativna učestalost dužine bušotine l (m) 0 5 10 15 20 25 0 .5 1 .1 1 .7 2 .3 2 .9 3 .5 4 .1 4 .7 5 .3 5 .9 6 .5 7 .1 7 .7 8 .3 8 .9 Dužina minskog punjenja lp (m) U če s ta lo s t 0% 10% 20% 30% 40% ...

  • Fuzzy Model for Risk Assessment of Machinery Failures

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...
    fazi teorija, rizik, otkaz rudarskih mašina
    ... and downtime due to failures in the subsystem “construction”. Subsystem Failure of Element Number of Failures Time to Failure (h) Time to Repair (h) C o n st ru ct io n Belt construction bending 2 553, 1792 3, 7 Belt construction fracture 6 90, 192, 230, 295, 305, 1276 2, 4, 4, 5, 6, 8 Sieve plate ...
    ... = (1/0, 2/0.65, 3/0.65, 4/0.65, 5/0); Rengine = (1/0, 2/1, 3/1, 4/1, 5/0); Relectrical system = (1/0, 2/0, 3/1, 4/1, 5/0); Rcrushing = (1/0, 2/1, 3/1, 4/1, 5/0); Rscreening = (1/0, 2/1, 3/1, 4/0, 5/0); Rtransport = (1/0, 2/1, 3/1, 4/0, 5/0); Rfeeder = (1/0, 2/0.65, 3/0.65, 4/0, 5/0); Rconstruction ...
    ... Element Number of Failures Time to Failure (h) Time to Repair (h) F e e d e r Feeder oil leakage 2 1201, 3046 1, 2 Feeder support fracture 2 1113, 3478 2, 4 Feeder shaft fracture 2 2253, 3476 24, 40 Loading points fracture 2 1240, 2951 2, 5 Feeder oil overheating 3 897, 1036, 3325 1, 1.5, 2.5 ...

  • Хазард од клизишта у Србији у 21. веку

    Biljana Abolmasov (2019)
    клизишта, хазард од клизишта, промене климе
    ... 1.3 2.6 44 Ww 2.4 4.2 0.9 2.2 4 0.7 2 3.8 0.5 1.8 3.6 0.3 1.6 3.4 0.2 14 3.2 3 > ( ) 2011 2040, 2014 2070. 2071 2100. ( ) 0,25 x 0/29) ) ANN A1B 2011-2040 ANN A1B 2041-2070 ANN A1B 2071-2100 30 30 20 20 10 10 5 5 0 ) -5 -5 -10 -10 -20 -20 -30 -30 2011 2040, 2014 2070. 2071 2100. 0,25 x 0,;:2529)]) ...
    ... > 2 > > > . 15. 4 30. 5. 2014. > > > > > [26] ( >» 6) 550.0 +5 m0 Oe = = - =; 0.0 A || al Ve ["] I Ih sigs 500.0 t — 1s — ; 450.0 an ——+ 20.0 400.0 : 6 30.0 == “2 349.7_, 350.0 40.0" = Se ale lad = E i ee ra £ 300.0 500 £ --4 $ 3 250.0 4 J eosaa==4 “=| 600 & & - mania Average 5 —— Valje 200.0 |} en » ...
    ... 100.0 —Tuzla 0.0 + | seeedes Zenic: 110.0 as S$ 8 8&8 S§ 8 8 $8 $$ FS 8B BS HF SF FF 8 3 8 $8 § &§ &$ 8 &€ 8 8 8 8 8 8 8 B = = = = = = = = = = = = = = = = a a a a a a a a a a a a a a a a >» 6. 10 > , 15. 30. 5. 2014. 5. 21. > > > > , _ . > > Intergovernmental Panel on Climate Changes) > > > [27]. ...